Edison Coatings, Inc., Plainville, CT 06062, U.S.
-- Training for Use of Mortars in Masonry Restoration. Custom Matching of Historic Mortars.
-- 860-747-2220  http://www.edisoncoatings.com

U. S. Heritage Group, Inc., Chicago, IL 60641, U.S.
-- Architectural Support Services, Lime Mortar Matching, Mortar Testing, Stone Repair Mortars, On-Site Contractor Training, Workshops in Historic Masonry Skills.
-- 773-286-2100  http://www.usheritage.com

Stone Products Consultants, Westport, MA 02790, U.S.
-- examinations of concrete, building stone, brick, cast stone, mortar, tile, roofing slate, etc.
-- 508-636-8244  http://www.members.aol.com/crushstone/petro.htm

deGruchy Masonry Restoration, Inc., Quakertown, PA 18951, U.S.
-- Masonry Restoration and Consulting. Nationwide Services.
-- 215-536-4482  http://www.repointing.com

Structural Restoration Services, Inc., Loganville, PA 17342, U.S.
-- Masonry Restoration, Waterproofing and Structural Repair of Historic Building Exteriors.
-- 800-775-1004  http://www.restore-it.com/

Abstract Masonry Restoration, Inc., Salt Lake City, UT 84107, U.S.
-- Masonry Restoration. Cleaning, Repairing and Preserving Brick and Stone.
-- 801-262-6344  http://www.masonry-restoration.com